package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.dto.SetmealDto;
import com.itheima.entity.Setmeal;
import com.itheima.entity.SetmealDish;
import com.itheima.mapper.SetmealMapper;
import com.itheima.service.SetmealDishService;
import com.itheima.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

   @Autowired
   private SetmealDishService setmealDishService;
    @Override
   @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐基本信息。操作setmeal，执行insert操作

      this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //保存套餐和菜品的关联信息，操作setmeal——dish表，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }


    /*
     *删除套餐，同时删除套餐和菜品的管理数据
     * */
    @Transactional
    @Override
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态，确定是否课删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
       queryWrapper.in(Setmeal::getId,ids);
       queryWrapper.eq(Setmeal::getStatus,1);

        int count = this.count(queryWrapper);
    if (count>0){
        //如果不能删除，抛出业务异常
        throw new CustomException("套餐正在售卖中，不能删除");
    }


        //如果可以删除，先删除套餐表中的数据
      this.removeByIds(ids);
        //删除关系数据
        LambdaQueryWrapper<SetmealDish> LambdaQueryWrapper = new LambdaQueryWrapper<>();
      LambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
       setmealDishService.remove(LambdaQueryWrapper);
    }


}
